Aerogel is a synthetically produced amorphous silica gel (different from crystalline silica) impregnated into a non-woven fibreglass substrate, offering the twin benefits of extreme thermal performance and a flexible blanket form (only 6 and 10mm thickness). AEROGEL products uses nanoporous structures that minimize the mechanisms of thermal transport, resulting lowest thermal conductivity values: λD is 0.015 W/mK at 10°C.

The primary difference between crystalline silica and the amorphous silica involves the lack of long range atomic order in amorphous silica that is seen in crystalline silica. The high degree of repeating atomic order in crystalline silica gives rise to its physical properties and the distinctive faceted morphology of its crystals.